Chelsea are extremely busy as the transfer window comes to a close, with many arrivals and departures expected.
With Bakayoko now earning a reported €6 million, it has been suggested that Chelsea could pay some of the player's wages in order to complete a move.
It remains to be seen how quickly AC Milan will seal the deal.
The 23-year-old France global joined the Blues from Monaco last summer for £40m and started 25 Premier League games in his first season in the Premier League.
According to Sky in Italy, Bakayoko could join the Serie A outfit as the Blues are dealing with a packed midfield consisting of N'Golo Kante, Jorginho, Cesc Fabregas, Ross Barkley, Ruben Loftus-Cheek and Danny Drinkwater.
The Premier League transfer deadline shuts at 5pm.
The Brazilian was late in turning up for pre-season, which new manager Maurizio Sarri was not too happy about.
They are also set to sign highly-rated Real Madrid midfielder Mateo Kovacic on a season-long loan. But the nail in the coffin was not even being on the bench during Chelsea's recent Community Shield loss to Manchester City.
With Milan leading the race for Bakayoko, Everton's interest appears to be dependent on whether or not they land Zouma.
Courtois has been trying to force his way out of Stamford Bridge this summer after refusing to sign a new contract and Chelsea have chose to cash-in rather than risk losing him for nothing next summer.